This page has news, information,
documentation and links software for the sysstat utilities that
I created for Linux. The sysstat utilities are a
collection of performance monitoring
tools for Linux. These include sar, sadf, mpstat, iostat,
tapestat, pidstat, cifsiostat and sa tools.
Go to the Features page to
display a list of sysstat's features, or see the Documentation page to
learn some more about them.
Sysstat is Open Source / Free
Software, and is freely available under the GNU
General Public License, version 2.

News

Saturday October 13th, 2018

Sysstat 12.1.1
released (development version).Sysstat 12.0.2 released
(stable version).
Sysstat 11.6.6 released (stable version) (EOL).
Sysstat 11.4.11 released (stable version) (EOL).This version mainly includes bugfixes. The only
noteworthy new feature is the addition of two new metrics
to sar -H (Hugepage activity): HugePages_Rsvd and
HugePages_Surp. Also sadf has been made more robust to
corrupted datafiles, enabling it to complete its job even
if an unexpected end of datafile is met.

Monday August 6th, 2018

Sysstat 12.0.1
released (stable version).Version 12.0.1 fixes a silly,
nasty bug found in previous version (12.0.0) which could
make your sar daily datafiles (files named saDD and saved
in the /var/log/sa directory) unreadable by future sar
versions. This would be a pity :-) So please upgrade!

Friday August 3rd, 2018

Sysstat 12.0.0
released (stable version).
Sysstat 11.6.5 released (stable version).Version 12.0.0 mainly focuses on SVG output from
the sadf command, with a lot of bugfixes and the addition
of a new option ("showtoc") that will enable the user to
quickly navigate through graphs.
Version 12.0.0 is also the first stable version that
includes the new, compact and flexible binary format for
sar.

Friday June 1st, 2018

Sysstat 11.7.4
released (development version).Sysstat 11.6.4 released
(stable version).
Sysstat 11.4.10 released (stable version).This version adds
several new options to control:

The number of decimal places used by sysstat
commands (sar, cifsiostat, iostat, mpstat and
pidstat),

The network interfaces, block devices and
filesystems for which statistics shall be displayed by
sar or sadf.

Note that this version also redefines the metric kbmemused
(amount of used memory displayed by sar) to be consistent
with the output of commands such as top(1) and free(1).
See sar's manual page.

Friday April 6th, 2018

Sysstat 11.7.3
released (development version).Sysstat 11.6.3 released
(stable version).
Sysstat 11.4.9 released (stable version).This version has improved support for
offline/online CPU (sar/sadf and mpstat). It also adds a
new option to sar (option "-z") to omit output for any
devices for which there was no activity during the sample
period (this option already existed for iostat). Last it
contains several important bug fixes, among them:

A
possible crash related to the new binary format used
by sar, which could happen when buffers needed to be
reallocated to accomodate more devices added to the
system,

The %CPU value displayed by pidstat for processes
using more than 100% of a core.

Monday February 12th, 2018

Sysstat 11.7.2 released
(development version).After one additional month of hard work,
sysstat version 11.7.2 seems to be quite stable on my
machine. It should now be possible to use it safely on
production systems. BTW I told you that sar's data files
new binary format would be at least 25% smaller than with
previous versions. I could have even said 30% to 45%
smaller!
Version 11.7.2 also includes a rewritten function that
will enable you to convert your old data files (from
versions 9.1.6 and later) to the up-to-date format
(11.7.2).
Please upload, test and tell me if anything goes wrong.

A
binary data file should take much less space on disk
thanks to new optimizations on how values are stowed
in memory. The space saved is estimated at least at
25% compared to previous format.

Structures are no longer statically allocated,
meaning that the system can now register as many new
devices (disks, network interfaces, etc.) as needed
and you will find all of them saved in your saXX data
file (provided that you have selected the
corresponding activities to collect). Previous version
could lead to some devices being ignored and going
unnoticed if no free structures were left.

Sar (and sadf) will now be able to read a binary
data file whatever its endianness is: Both big-endian
and little-endian files can be read by the same sar or
sadf executable.

More flexibility has been added to sar’s binary data
file format. I cannot promise that the format won’t
change again in the future but it should now be
possible to add new metrics or activities without
making the format unreadable by older sar versions
(starting with version 11.7.1). Older versions will be
able to read newer formats but will display only the
metrics they currently know.

Version 11.7.1 is a development
version. As such, it is still NOT ready
for use in production. Yet I would really like to have
it tested by the maximum number of users and get
feedback! :-)

NOTE: The function provided by
sadf (option –c) to convert an old data file to the
up-to-date format has been temporarily inhibited. This
function will be working again in next sysstat version
(11.7.2).

Wednesday November 1st, 2017

Sysstat 11.6.1 released (stable
version).
Sysstat 11.4.7 released (stable version).
Sysstat 11.2.13 released (stable version).
These versions fix the bugs found these past two months. I
release them now since the next major sysstat version
(11.7.1) is still under development and it could take some
time for me to complete. It will include deep changes to
sar's data files format.

Monday August 14th, 2017

Sysstat 11.6.0 released (stable
version).
Sysstat 11.4.6 released (stable version).
Sysstat 11.2.12 released (stable version).
Version 11.6.0 (the first of a new stable series) mainly
focuses on the pidstat command, with the addition of two
new options: Option -e can be used to pass a program to
execute and make pidstat monitor it, whereas option -H
tells pidstat to display timestamps in seconds since the
Epoch.
Also these versions revert a fix (added in previous
sysstat version to fix a possible sadc crash on ARM
architecture) that could cause segmentation faults in some
cases.

Wednesday July 5th, 2017

Sysstat 11.5.7 released (development
version).Sysstat 11.4.5 released (stable
version).
Sysstat 11.2.11 released (stable version).
Improvements added here mainly concern the iostat command:
New metrics added to the extended statistics report, a new
switch (-s) to display a short (narrow) version of the
report that will fit in 80 characters wide screens, the
JSON output that now depends on options used... Also to be
noted: Several metrics (from iostat and sar) are now
expressed in kilobytes instead of sectors.
Last but not least, this development version includes a
set of bugfixes that you will also find in the 11.4.x and
11.2.x series.

Wednesday May 10th, 2017

Sysstat 11.5.6 released (development
version).Sysstat 11.4.4 released (stable
version).
Sysstat 11.2.10 released (stable version).
The main new feature added to sysstat version 11.5.6
concerns the mpstat command: It can now display statistics
based on NUMA nodes placement (see its new switch "-n").
Other changes included here are bugfixes that have also
been backported to the 11.4.x and 11.2.x series.

Monday February 27th, 2017

Sysstat 11.5.5 released (development
version).This version includes some minor new
features, notably for the creation of SVG graphs with
sadf: The user can now put several charts on the same row
(option "packed" to be used with "sadf -O") and he can
also explicitly specify the canvas height (option
"height=...").
Besides, a new metric (%wait field) has been added to the
CPU utilization report displayed by pidstat. This field
shows the percentage of CPU spent by the task while
waiting to run.

Wednesday January 11th, 2017

Sysstat 11.5.4 released (development
version).Sysstat 11.4.3 released (stable
version).
Sysstat 11.2.9 released (stable version).
I have added a new output format to sadf (the "raw" output
format) that I personally needed for debugging purposes.
With this format, counters values are printed as read from
the kernel.
This version also removes memory statistics displayed by
"sar -R" to keep only those displayed by "sar -r" (the
latter are those that are really meaningful).
Last the development and stable versions include a patch
to better handle dynamically registered devices (disks,
network interfaces...)

Tuesday December 06th, 2016

Sysstat 11.5.3 released (development
version).Several new features have been added into
this development version. First a new metric, providing
available free memory, has been added to sar (it can be
displayed with option -r). Also a new option ("showidle")
can be used with sadf's option -O to display CPU %idle
state in SVG graphs created by sadf. Last a new option
("--human") has been added to most sysstat commands (sar,
iostat, pidstat, etc.) to display sizes in a human
readable format: See the screenshot below...

Friday November 04th, 2016

Sysstat 11.5.2 released (development
version).Sysstat 11.4.2 released (stable
version).
Sysstat 11.2.8 released (stable version).
In this developement version, sar now reports statistics
for software-based network processing, based on data
collected from the /proc/net/softnet_stat file.
This will be particularly useful for the sysadmin as this
file's contents is not easy to read (values are printed in
hex) and proper documentation was lacking. Development and
stable versions also include their bunch of bug fixes. See
the changelog available from the download page.

Friday September 23rd, 2016

Sysstat 11.5.1 released (development
version).Sysstat 11.4.1 released (stable
version).
Sysstat 11.2.7 released (stable version).
This development version adds JSON output to mpstat and
iostat commands. The development and stable versions also
fix two outstanding bugs: one concerning sadf ability to
convert an old datafile to up-to-date format,and the other
concerning pidstat which omitted kernel threads when using
-l option. Please upgrade.

Monday August 15th, 2016

Sysstat 11.4.0 released (stable
version).
Sysstat 11.2.6 released (stable version).
Only small bug fixes have been added into these versions.
Sysstat 11.4.0 is the first stable version including SVG
support for sar/sadf. Sysstat 11.2.6, from the previous
stable series, doesn't include SVG support. Enjoy!

Friday June 24th, 2016

Sysstat 11.3.5 released (development
version).Sysstat 11.2.5 released (stable
version).
This version concludes the addition of the new SVG
(Scalable Vector Graphics) output format to sadf. It is
now possible to draw graphs for almost every sar's
activity. This version also adds a new option (named
"oneday"), to be used with sadf's switch -O, to display
graphs data over a period of 24 hours. Last, this version
includes the usual set of bug fixes (also backported to
the stable 11.2.x branch).

Saturday May 14th, 2016

Sysstat 11.3.4 released (development
version).Sysstat 11.2.4 released (stable
version).
sadf can output an SVG graph for many more activities here
(fan speed and temperature sensors, I/O and transfer rate
statistics, network activities, etc.) Interestingly
enough, this version also adds a new switch to sadf (-O)
to pass extra options enabling the user to control SVG
output. Two such options are currently supported:
"autoscale" and "skipempty" (see sadf(1)
manual page).

Saturday April 9th, 2016

Sysstat 11.3.3 released (development
version).Sysstat 11.2.3 released (stable
version).
This version carries on improving SVG support by sadf: You
can now draw graphs for CPU statistics (see a sample
output below), CPU frequency statistics, memory and swap
statistics, and queue length and load average statistics.

Sunday March 13th, 2016

Sysstat 11.3.2 released (development
version).Sysstat 11.2.2
released (stable version).
This version improves SVG support by sadf, with 3 more
activities for which graphs can now be drawn: Paging
activity, network interfaces statistics and swapping
statistics. SVG output has been updated to make it fully
compliant with SVG 1.1 standard. Last, several
longstanding bugs have been fixed here and also included
in the stable 11.2.2 version.

Sunday February 21st, 2016

Sysstat 11.3.1 released (development
version).Sysstat 11.2.1.1
released (stable version).
The sar and sadf tools in this development version have
been largely reworked to prepare the addition of a new
output format to sadf: SVG(Scalable Vector
Graphics). At the present time, graphs can be
generated only for task creation and switching activity as
a "proof of concept" (this corresponds to the output of
sar -w). Here is a
sample graph that you can get with "sadf -g
/var/log/sa/saDD -- -w > graph.svg". Other sar
activities will be added in the next sysstat versions to
come. Ultimately you will be able
to draw graphs using sysstat's standard tools (sar and
sadf)! Life is cool...! :-)

Sunday December 27th, 2015

Sysstat 11.2.0
released (stable version).
This version is the first one of a new stable series,
including all the new features from the previous 11.1.x
development series. Various bugs have been fixed and small
improvements added since the last 11.1.8 version. Best
wishes for the festive season! :-)

Friday October 23rd, 2015

Sysstat 11.1.8 released (development
version).Sysstat 11.0.8
released (stable version).
This development version adds color support for pidstat,
tapestat and cifsiostat commands. All sysstat commands now
support smart output colorization for easier statistics
reading. It's also possible to customize the colors with
the S_COLORS_SGR environment variable. Read the manual
pages to know how to use it. Enjoy!

Sunday September 20th, 2015

Sysstat 11.1.7 released (development
version).Sysstat 11.0.7
released (stable version).
The iostat, mpstat and sar commands can now display their
statistics in color on the terminal. It's a nice
feature I've had in mind for a long time. Colors are
selected depending on the values to display (eg. zero or
non zero value; low / medium / high percentage value...).
To enable this feature, just set the S_COLORS environment
variable. Here is a sample output from the mpstat command:

I plan to allow the user to cutomize the colors in a
future sysstat release.
This version also includes important fixes for the new
tapestat command and also for pidstat.

Monday August 24th, 2015

Sysstat 11.1.6 released (development
version).Sysstat 11.0.6
released (stable version).
This development version includes a new command: tapestat.
tapestat is aimed at displaying statistics for tape drives
connected to the system. It requires the newest kernel
version 4.2 (which has still not been released as of this
writing) to work. This new command has been contributed by
Shane Seymour from HP.

Friday June 12th, 2015

Sysstat 11.1.5 released (development
version).Sysstat 11.0.5
released (stable version).
This version adds support for Fibre Channel HBA statistics
(contributed by Steve Kay). It also includes its bunch of
fixes based on static analysis reported by Coverity.

Tuesday April 7th, 2015

Sysstat 11.1.4 released (development
version).Sysstat 11.0.4
released (stable version).
Lots of bug fixes and improvements here. Peter Schiffer,
Steve Kay and Dimitrios Apostolou are the main
contributors for this release. Among the new features, you
will now be able to display the mountpoint name instead of
the filesystem name when displaying filesystem statistics
with sar. And this version also includes sargraph2 in the
contrib directory, a promising new plotting tool working
with sar and contributed by Dimitrios.

Friday February 13th, 2015

Sysstat 11.1.3 released (development
version).Sysstat 11.0.3
released (stable version).
Five new metrics have been added to memory statistics
displayed by sar. You now have to enter "sar -r ALL" to
display all the memory metrics as there are many of them
now (entering only "sar -r" displays the usual memory
metrics).
Sysstat 11.1.3 has also undergone a complete Coverity
static analysis (thanks go to Peter Schiffer from RedHat),
resulting in many small fixes being included here.
Last some work has been done with the configure script to
make it easier for distro maintainers to package sysstat.
Enjoy!

Sunday October 19th, 2014

Sysstat 11.1.2 released (development
version).Sysstat 11.0.2
released (stable version).
Version 11.1.2 includes two new commands in the contrib
directory: irqtop (contributed by Robert Elliott from HP),
which monitors differences in /proc/interrupts and
/proc/softirqs per CPU along with CPU statistics, and
irqstat (contributed by Lance Shelton from
SanDisk/Fusion-io) designed for NUMA systems with many
processors. These two commands should be merged in a
future sysstat version.
Apart from that, this version includes mainly bug fixes
(which you can find in the stable 11.0.2 version).

Saturday August 30th, 2014

Sysstat 11.1.1 released (development
version).Sysstat 11.0.1
released (stable version).
From now on I will maintain two branches concurrently: one
for the stable versions of sysstat including only bug
fixes, and one for the development versions including all
the newest features (and also the bug fixes added to the
stable branch). A development version and a stable version
will always be released at the same time.
Wrt sysstat 11.1.1, the main new feature here is the
addition of a new switch to sadf (-c) that enables the
user to convert a binary datafile with an old format (at
least 9.1.6) to the up-to-date format (which is 11.1.1 as
of today).

Tuesday June 17th, 2014

Sysstat 11.0.0
released (stable version).
Sysstat is back with a stable version. This one includes
interesting new features. First the pidstat command has
been enhanced with the addition of two new options: -R (to
display task scheduling priority and policy information)
and -G (to filter processes by name, displaying all
threads of matching processes). Then new enhancements have
been brought to sar, sadc and sadf with regards to
standard system activity daily data files: These may now
be named "saYYYYMMDD" instead of "saDD" using sar's and
sadc's option -D, and they can be located in a directory
which can be different from the standard /var/log/sa
place. The new directory can be set in an environment
variable (SA_DIR, used by sa1/sa2 scripts) or directly
given on the command line to sar/sadc/sadf.

Tuesday March 18th, 2014

Sysstat 10.3.1
released (development version).
I had to switch back to a development version because of a
change of sar's datafiles format. But this is (really) for
a good cause... After a period of hard work, this version
of sysstat includes a long awaited feature: sar can now
take into account a change of CPU count in its datafiles.
On virtual machine, after CPU change (e.g. power off
machine -> add 1 CPU -> power on machine), you will
no longer lose data (from today) from the current saXX
file. The restart mark (this is the LINUX RESTART message
inserted when sadc is called without any parameters) will
be used by sar to know that CPU count has changed.
Note that I plan to go back to a stable series for next
sysstat version (which will be 11.0.0).

Sunday January 19th, 2014

Sysstat 10.2.1
released (stable version).
In this version, pidstat I/O statistics includes a new
metric giving per-task block I/O delays. There are also
some other small improvements: The addition of a new
option to configure script (--enable-copy-only) or the
data file creation date being now displayed by sadf.

Sunday November 3rd, 2013

Sysstat 10.2.0
released (stable version).
This is yet another stable series! This version mainly
focuses on pidstat, with several bug fixes and the
addition of a new option (-v) enabling the user to display
the number of threads and file descriptors associated with
tasks.

Friday September 13th, 2013

Sysstat 10.1.7
released (development version).
Various fixes all around here. And worth noting is the
addition of a new metric to sar network devices
statistics: %ifutil, giving the utilization percentage of
the network interface cards. Download and enjoy!

Sunday June 9th, 2013

Sysstat 10.1.6
released (development version).
The main new feature added here is the ability for sar to
display filesystems statistics (blocks and inodes
utilization) with its new option "-F". Also several
(small) bugs have been fixed.

Thursday April 25th, 2013

Good news! Sysstat is
now on GitHub
and I have set up a public repository available for all
of you willing to contribute!

Sunday March 31st, 2013

Sysstat 10.1.5
released (development version).
This version fixes some more bugs. We found that systemd
unit file could no longer be installed because a macro
wasn't expanded in configure script. This is fixed here.
Also mpstat has been updated so that the number of
interrupts per processor actually add up to the number
displayed for CPU "all".

Friday March 8th, 2013

Sysstat 10.1.4
released (development version).
There are two main improvements in this version: The first
one concern commands like sar, pidstat and mpstat which
now display their average statistics data when they
receive a SIGINT signal (control-c). The second one is
again for pidstat: pidstat now displays the UID number for
all tasks being monitored. A new option (-U) has also been
added so that the name of the real user owning the task
can be displayed instead of the UID.

Sunday December 23rd, 2012

Sysstat 10.1.3
released (development version).
This is mainly a bugfix release. What is worth noting here
is the format change for network and IPv4/IPv6 counters
which are now 64-bit wide to keep in sync with current
Linux kernels. As a consequence this breaks compatibility
with older sar data files format for those statistics (and
only those ones).
OK. Pick it up from under the Christmas tree and enjoy...

Saturday October 6th, 2012

Sysstat 10.1.2
released (development version).
Two new metrics have been added here: the time spent by
processors running a niced guest (displayed as "%gnice" by
sar -u and mpstat) and the amount of memory waiting to get
written back to disk (displayed as "kbdirty" by sar -r).
This version also includes support for "systemd", the
system and service manager intended to replace the init
daemon for Linux.

Sunday July 29th, 2012

Sysstat 10.1.1
released (development version).
Big thanks go to Peter Schiffer from Redhat for his
contribution to this version, the first one of a new
development series. One of his patches adds persistent
device names support to sar and iostat. As a consequence
it is now possible to display (and specify) a device using
his label, UUID, or any other type for which a directory
is present in /dev/disk. Unrelated to this, I have also
added a new way to tell sar from which daily data file he
should display stats. Before you had to use something like
"sar
-f /var/log/sa/saDD [...]". It's now
possible to enter "sar -1 [...]" to
display stats from the daily data file of yesterday. Of
course you can enter any number (-3, -12, etc.) to show
data of that days ago. Full changelog available from the
download page. Have fun :-)

Wednesday May 16th, 2012

Sysstat 10.0.5
released (stable version).
An interesting new feature has been added to iostat here:
iostat can now display consolidated statistics for one or
several groups of devices. This should prove useful for
machines with lots of disks. Apart from that, this version
includes some bug fixes for sadc and sadf, and a new
translation file for Croatian people.

Wednesday March 7th, 2012

Sysstat 10.0.4
released (stable version).
This version includes bugfixes for sar and iostat: Virtual
devices are no longer taken into account in sar -b
results, and iostat can now display target device
information when a symbolic link is specified as a
parameter. A new option (--disable-stripping) has also
been added to configure to tell it to not strip object
files. Last, NLS has been updated with the addition of
Serbian translation.

Sunday November 27th, 2011

Sysstat 10.0.3
released (stable version).
The main change in version 10.0.3 is the addition of JSON
(JavaScript Object Notation) output format to sadf. This
format is easy to read but less verbose than XML. Try it
with "sadf -j /your/sar/datafile".

Sunday August 28th, 2011

Sysstat 10.0.2
released (stable version).
No new groundbreaking features in this release (hey, this
is a stable series!) sadf has been heavily modified to
make it easier to add new report formats later. I'm not
very happy with the result anyway as its design is still
not completely generic. Apart from that, a new option ("-P
ON") has been added to mpstat. It indicates that
statistics should be displayed only for online processors.

Friday June 3rd, 2011

Sysstat 10.0.1
released (stable version).
A new feature has been added to sar in this version. It
can now take a snapshot of all the USB devices currently
plugged into the system. Although this is a discrete
monitoring process by nature, it should help the sys
admins to detect the introduction of USB storage devices
(eg. external hard drives, flash drives, thumb drives...)
and close some potential security vulnerabilities. This
version also includes the usual bunch of bugfixes (sar,
sadf, cifsiostat...) Just go to the download page and
enjoy!

Tuesday March 15th, 2011

Sysstat 10.0.0
released (stable version).
This is mainly a bugfix release. Several bugs have been
fixed in nfsiostat and cifsiostat commands (thanks go to
Masanari IIda for reporting them and Ivana Varekova from
Redhat for fixing them). Also worth noting is that only
sadc is now linked with lm_sensors library when needed.
Read the full changelog to know all the changes included
in this version.

Sunday December 26th, 2010

Sysstat 9.1.7
released (development version).
OK. So I took my Santa Claus dress to put this new version
of sysstat under the Christmas tree. This one includes
some new metrics for sar (amount of active and inactive
memory, processes blocked waiting for I/O to complete) and
also various optimizations and improvements. This should
be the last version from the development series ; expect
version 10.0.0 to be released around the month of
February. Enjoy!

Wednesday November 10th,
2010

Sysstat 9.1.6
released (development version).
Lots of changes in this version. First, new metrics have
been added to sar and sadc: These are hugepages
utilization statistics, and average CPU clock frequency.
To get the latter, you will need the cpufreq-stats driver
compiled in your kernel. Then you should note that, after
two years and a half of backward compatibility, this
version breaks the format of sar daily data files again.
This was made necessary for the inclusion of average CPU
clock frequency. So I also took advantage of this to add a
"compatibility marker" for each activity available in
file, so that a future change concerning one activity only
hits this activity and not the whole file.

Sunday September 12th, 2010

Sysstat 9.1.5
released (development version).
Other new metrics have been added to the power management
group of statistics again. In particular this version adds
voltage inputs stats to sar data. Please test it!

Thursday July 29th, 2010

Sysstat 9.1.4
released (development version).
New metrics have been added to the power management group
of statistics in sar (patch from Jan Kaluza from Redhat).
This version enables you to monitor fans speed and devices
temperature. You will need the libsensors library (part of
the lm_sensors
project) installed for that.

Sunday June 27th, 2010

Sysstat 9.1.3
released (development version).
Lots of new features in this release. Two new commands
have been added (nfsiostat and cifsiostat) enabling the
user to display I/O statistics for NFS and CIFS
filesystems (courtesy Ivana Varekova from Redhat). Other
improvements concern mainly pidstat: It's now possible to
select tasks using a regular expression with option -C. A
new option has also been added to pidstat to display stack
statistics (patch by Mario Konrad).

Sunday May 23rd, 2010

Sysstat 9.1.2
released (development version).
New fields have been added to iostat's extended
statistics, giving the average time for read and write
requests to be served (thanks go to Jérôme Marchand from
Redhat for his help with that). Note that those fields
should not be mistaken for read and write service times as
they also include the time spent by the requests in
queue... Also with this version, tickless CPUs will no
longer be displayed as offline processors, but as 100%
idle ones.

Sunday February 28th, 2010

Sysstat 9.0.6.1
released (stable version).
Sysstat 9.1.1 released (development version).
More than 3 months have passed since the last sysstat
release. After more than 10 years spent working on
sysstat, I still certainly enjoy working on this project
although a wife and two children have now made it a bit
more difficult... Even if things go much more slowly now,
I decided to start a new development series, so here is
version 9.1.1, ready for you to test. See the release
notes available from the download page. Note that from now
on, sysstat will no longer support kernels older than 2.6.
This enabled me to get rid of many lines of code...

Wednesday November 11th,
2009

Sysstat 9.0.6
released (stable version).
Apart from small bug fixes, this version improves the use
of sadf with its -x option (displaying XML output): it is
now possible to specify a starting and ending time with
options -s and -e. Interval and count parameters are also
taken into account by sadf -x. Oh, and this version also
includes a new tool (sargraph) from Lans Carstensen to
make graphs based on XML output from sadf!